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Chiral superconductivity on a silicon surface

IAMM researchers, along with colleagues from other institutions, presented evidence that a dilute monatomic tin layer on p-type silicon may host topological superconductivity. The superconductivity arises from strong Mott correlations on a triangular lattice in conjunction with hole doping. The critical temperature depends on the doping level and can be as high as 9 K, higher that that of any elemental superconductor except niobium. The work was published in Nature Physics and highlighted on the physics department website.

Quasi-particle interference spectrum in the superconducting state. The central ‘flower’ feature arises from scattering processes that break time-reversal symmetry.